Kolanjinathan P.,PWD |
Perumal P.,Salem College
European Journal of Scientific Research | Year: 2011
Self Compacting Concrete - a highly fluid concrete mixture with no segregation and can compact under its self weight. The use of SCC is spreading all over the world, but it is in infant stage in India. SCC requires considerably more fines content as compared to traditional concrete to achieve self compactability. Looking at the potential of cementitious constituents in fly ash and availability in abundance in million tonnes as a byproduct of the thermal power plant demanding environmental solution, large volumes of fly ash, partially in substitution for cement and partially as filler, can be employed in SCC. The concrete grade for the study was chosen as M25 and mix for the normal concrete of this was designed by IS code method. In self compacting concrete, equivalent mix was chosen as per literature in reference. Self Compacting Concrete mix with selected superplacticizers and VMA with 40% fly ash content in total powder content were prepared and their properties in the fresh state viz, passing ability, filling ability and segregation resistance were studied for the assessment of the self compactability. Axial load carrying capacity of reinforced concrete column specimens and reinforced SCC column specimens were studied © EuroJournals Publishing, Inc. 2011.
Mittal S.,Indian Institute of Technology Roorkee |
Biswas S.,PWD |
Singh K.,Central Road Research Institute
Water and Energy International | Year: 2012
The paper discusses the improvement in bearing capacity of square footing placed at cohesionless soil reinforced with Geocell. Mohr - Coulomb failure criterion was used in the observations. To study effects of geocells with respect to planar geogrid, tests were conducted on planar reinforcement also. Numerical analysis results obtained by PLAXIS have been compared with those obtained from experiments and were found to be in good agreement. A parametric study revealed the role of length of reinforcement, spacing between layers, placement of reinforcement from top surface etc. on bearing capacity. A design example has been given to illustrate the savings in cost of construction of footing on reinforced sand. The study shows that improvement in bearing capacity with respect to unreinforced soil is of the order of 86% and settlement reduction is 13.07% for single layer of geocells which for double layers of geocells is 693% and 86.48% respectively. The cost reduction is 23.5% with respect to unreinforced soil.
Aggarwal S.,PWD |
Sharma S.K.,National Institute of Technical Teachers Training and Research
Indian Concrete Journal | Year: 2015
In this paper, the large scale utilisation of lime mud in construction industry particularly in concrete works has been explored. Experimental investigations were carried out to evaluate the strength properties of Lime mud blended cement concrete. The nominal mixes of concrete M-15 and M-20 grade were considered and produced by replacing cement partially with lime mud. Cement in concrete was replaced with 0%, 10%, 20% and 30% with lime mud and a set of cubes were cast. The compression tests were carried out to evaluate the strength properties. Ultrasonic Pulse Velocity tests were carried out at 7 days and 28 days. Test results indicated that ordinary concrete can be produced by replacing cement with lime mud.
Couillard E.,PWD |
Hesson M.D.,PWD Source Water Protection Program |
Anderson K.,PWD Source Water Protection Program |
Crockett C.,PWD Source Water Protection Program |
McCarty M.E.,PWDs Office of Watersheds
Journal - American Water Works Association | Year: 2015
Philadelphia Water Department's (PWD)source water assessments (SWA) led to a carefully developed, multi-faceted plan that extends into two important watersheds, the Schuylkill River and Delaware River watersheds, and ensures protection of the region's water supply. By accomplishing watershed goals and building program capabilities, PWD has developed a source water protection program (SWPP). The SWPP employs science and research, innovation, ordinances, technology, and most important partnerships as mechanisms to accomplish program goals. The SWPP uses watershed partnerships, science, and research to implement upstream pathogen-reduction best practices. Through policy development and implementation in Philadelphia, PWD is poised to demonstrate to upstream partners stormwater management practices that protect source water quality. Source water protection also mobilizes organizations not regulated by national water policy and unites them with the regulated community around the common cause of maintaining one shared water. The SWPP uses a triple-bottom-line approach to pathogen reduction. Partnerships play an important role in all source water protection initiatives.
Gowri S.,PWD |
International Journal of Applied Engineering Research | Year: 2015
The recent environmental deterioration and decrease in natural resources, urges the need to increase the life of the existing structures. The study on various methods of rehabilitation techniques, methods of its application, its behaviour after rehabilitation over concrete structures is being carried out in a wide spread manner. In the recent years, the use of Glass fibre wrapping over the structural members seems to be the most competitive method for all the structural elements like column as well as beams. This Fibre Reinforced Polymers (FRP) wrapping increases the confinement there by the acts as an outer strengthening layer to the structural elements. This study focuses on the laboratory analysis of Concrete beam strengthened with various types of FRP and it applications at various places to increase the flexural as well as the shear strength of the beam subjected to static loading. © Research India Publications.